US2159908A - Method of producing stable solutions of sulphur in mineral and other oils - Google Patents

Method of producing stable solutions of sulphur in mineral and other oils Download PDF

Info

Publication number
US2159908A
US2159908A US138007A US13800737A US2159908A US 2159908 A US2159908 A US 2159908A US 138007 A US138007 A US 138007A US 13800737 A US13800737 A US 13800737A US 2159908 A US2159908 A US 2159908A
Authority
US
United States
Prior art keywords
sulphur
mineral
oils
oil
solvent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US138007A
Inventor
Edward A Nill
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US138007A priority Critical patent/US2159908A/en
Application granted granted Critical
Publication of US2159908A publication Critical patent/US2159908A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M1/00—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants
    • C10M1/08—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants with additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04—Elements
    • C10M2201/043—Sulfur; Selenenium; Tellurium
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/40—Fatty vegetable or animal oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/02—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions containing carbon, hydrogen and halogen only
    • C10M2211/022—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions containing carbon, hydrogen and halogen only aliphatic
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/06—Perfluorinated compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/041—Triaryl phosphates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/24—Metal working without essential removal of material, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/241—Manufacturing joint-less pipes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/242—Hot working
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/243—Cold working
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/244—Metal working of specific metals
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/244—Metal working of specific metals
    • C10N2040/245—Soft metals, e.g. aluminum
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/244—Metal working of specific metals
    • C10N2040/246—Iron or steel
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/244—Metal working of specific metals
    • C10N2040/247—Stainless steel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
    • Y10S516/924—Significant dispersive or manipulative operation or step in making or stabilizing colloid system
    • Y10S516/926—Phase change, e.g. melting

Definitions

  • This invention relates to a method of producing a soluble sulphur and more particularly to a method of producing stable solutions of sulphur in mineral and other oils.
  • Lubricants employed in metal working operations such as drawing and cutting should have very high film strength and. high heat capacity. These lubricants usually are mineral oils or a mixture of mineral oils and animal or vegetable oils'to which may be-added various ingredients for increasing film strength and the heat absorbing capacity of the lubricant. Sulphur has been found to be very effective for these purposes. The method heretofore commonly employed has been to add to mineral oil a sulphuriz'ed fatty oil which is produced by heating a mixture of sulphur and oil for a considerable length of time to a temperature of about 450 F. Lubricating compositions so made are of very dark color, almost black, and a considerable portion of the sulphur is chemically combined with the oil.
  • the dark color is objectionable in cutting operations because it makes it very difficult for the operator to see the action of the cutter on the metal.
  • Another disadvantage is that the stain made by the lubricant on the metal is diflicult to remove.- Also, the sulphur compounds in the lubricant give it a disagree- 'able odor and are poisonous, causing painful skin irritations.
  • the present invention has for its object to provide a method of making stable solutions of sulphur in mineral oil which contain a percentage of sulphur at least as high as obtained by the use of sulphurized fatty oils, which is of light color, transparent, odorless, and non-poisonous.
  • the process of the present invention consists in first converting the sulphur into a form more readily' soluble in mineral oil and then dissolving ble in mineral oils than any commercial forms of sulphur.
  • the solvent used may be a mineral, vegetable or'fatty oil or any other solvent from which a substantial proportion of the sulphur will precipitate upon cooling.
  • the liquid solvent is heated to a temperature of from 250 to 260 F. and sulphur, either rock sulphur or flowers of sulphur is stirred into the liquid until a substan- (on. was) tially saturated solutionis obtained.
  • the solution is then allowed to cool andsulphur is precipitated in the form of very fine needlelike' crystals.
  • the precipitate is then added to mineral or other oil at a temperature slightly below the melting point of sulphur.
  • the crystalline sulphur precipitate will readily dissolve in the oil and remain in solution after the oil is cooled.
  • Solutions of sulphur in mineral oil containing from 2% to 5% sulphur can readily be made by the method above described. These solutions are of a light yellow color and quite transparent.
  • the precipitated sulphur may be filtered from the solvent and washed without afiecting its solubility in mineral and other oils but if the solvent employed is one which does not injuriously affect the lubricating qualities of the oil to which the precipitate is to be added, it is usually more convenient to simply allow the precipitate to settle, draw olf the clear solvent and add the sulphur sediment together with as much of the solvent as remains mixed with the precipitated sulphur.
  • Lard oil is a, desirable ingi'edient of cutting and drawing lubricants. Either a light mineral oil or lard oil can be advantageously used as a sulphur solvent.
  • Certain chemical compounds which are known to be advantageous ingredients of cutting or drawing lubricants also are capable of dissolving substantial percentages of sulphur at a temperature slightly above the melting point of sulphur and of precipitating substantial quantities of sulphur upon cooling. Examples of such chemical compounds are tricresyl phosphate and chlorinated paraflin, eitherof: which may be employed as the solvent for sulphur.
  • sulphur solvents which will take a substantial quantity of sulphur into solution at from 250 to 265 and from which a substantial quantity of sulphur will precipitate upon cooling may be employed. If the solvent is undesirable in the lubricating composition, the sulphur can be filtered out and washed prior to it's addition to the lubricating oil.
  • the herein described method of making a stable solution of sulphur in mineral oils which comprises making a substantially saturated so lution of sulphur in an organic liquid solvent at a temperature above the melting point of sulphur but below a temperature at which the solution is discblored, allowing the solution to cool and precipitate sulphur, separating the precipitated sulphur from the solvent, and dissolving sulphur so precipitated in a mineral oil at a temperature somewhat below the melting point 0 sulphur.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Description

Patented May 23, 1939 TIONS F SULP OTHER OHIS Edward A. Nlll, Highland Park, Mich.
No Drawing. Application April 20, 937, Serial No. 138,007
4 Claims.
This invention relates to a method of producing a soluble sulphur and more particularly to a method of producing stable solutions of sulphur in mineral and other oils.
Lubricants employed in metal working operations such as drawing and cutting should have very high film strength and. high heat capacity. These lubricants usually are mineral oils or a mixture of mineral oils and animal or vegetable oils'to which may be-added various ingredients for increasing film strength and the heat absorbing capacity of the lubricant. Sulphur has been found to be very effective for these purposes. The method heretofore commonly employed has been to add to mineral oil a sulphuriz'ed fatty oil which is produced by heating a mixture of sulphur and oil for a considerable length of time to a temperature of about 450 F. Lubricating compositions so made are of very dark color, almost black, and a considerable portion of the sulphur is chemically combined with the oil. The dark color is objectionable in cutting operations because it makes it very difficult for the operator to see the action of the cutter on the metal. Another disadvantage is that the stain made by the lubricant on the metal is diflicult to remove.- Also, the sulphur compounds in the lubricant give it a disagree- 'able odor and are poisonous, causing painful skin irritations.
The present invention has for its object to provide a method of making stable solutions of sulphur in mineral oil which contain a percentage of sulphur at least as high as obtained by the use of sulphurized fatty oils, which is of light color, transparent, odorless, and non-poisonous.
The process of the present invention consists in first converting the sulphur into a form more readily' soluble in mineral oil and then dissolving ble in mineral oils than any commercial forms of sulphur. V
The solvent used may be a mineral, vegetable or'fatty oil or any other solvent from which a substantial proportion of the sulphur will precipitate upon cooling. The liquid solvent is heated to a temperature of from 250 to 260 F. and sulphur, either rock sulphur or flowers of sulphur is stirred into the liquid until a substan- (on. was) tially saturated solutionis obtained. The solution is then allowed to cool andsulphur is precipitated in the form of very fine needlelike' crystals. The precipitate is then added to mineral or other oil at a temperature slightly below the melting point of sulphur. The crystalline sulphur precipitate will readily dissolve in the oil and remain in solution after the oil is cooled. Solutions of sulphur in mineral oil containing from 2% to 5% sulphur can readily be made by the method above described. These solutions are of a light yellow color and quite transparent. The precipitated sulphur may be filtered from the solvent and washed without afiecting its solubility in mineral and other oils but if the solvent employed is one which does not injuriously affect the lubricating qualities of the oil to which the precipitate is to be added, it is usually more convenient to simply allow the precipitate to settle, draw olf the clear solvent and add the sulphur sediment together with as much of the solvent as remains mixed with the precipitated sulphur. A small quantity of the lighter frac-' tions of mineral oil does not lnjuriously affectthe lubricating properties of a mineral oil lubricating composition. Lard oil is a, desirable ingi'edient of cutting and drawing lubricants. Either a light mineral oil or lard oil can be advantageously used as a sulphur solvent. Certain chemical compounds which are known to be advantageous ingredients of cutting or drawing lubricants also are capable of dissolving substantial percentages of sulphur at a temperature slightly above the melting point of sulphur and of precipitating substantial quantities of sulphur upon cooling. Examples of such chemical compounds are tricresyl phosphate and chlorinated paraflin, eitherof: which may be employed as the solvent for sulphur.
Other sulphur solvents which will take a substantial quantity of sulphur into solution at from 250 to 265 and from which a substantial quantity of sulphur will precipitate upon cooling may be employed. If the solvent is undesirable in the lubricating composition, the sulphur can be filtered out and washed prior to it's addition to the lubricating oil.
" Furthermore, it is to be understood that the particular procedure set forth is presented. for purposes of explanation and illustration and that various procedures can be followed without departing from -my invention as defined in the appended claims.
What I claim is:
1. The process of making solutions of sulphur in mineral oil which consists in dissolving sulphur in a solvent at a temperature slightly above the melting point of sulphur, allowing the solution to cool andprecipitate sulphur, and adding sulphur so precipitated to a mineral oil heated to a temperature somewhat below the melting point of sulphur.
2. The process of making solutions of sulphur in mineral oil which consists in dissolving sulphur in a solvent at a temperature of about 250 to 265 F., allowing the solution to cool and precipitate sulphur, and. adding sulphur so precipitated to a mineral oil heated to a temperature of about 150.
3. The herein described method of making a stable solution of sulphur in mineral oils, which comprises making a substantially saturated so lution of sulphur in an organic liquid solvent at a temperature above the melting point of sulphur but below a temperature at which the solution is discblored, allowing the solution to cool and precipitate sulphur, separating the precipitated sulphur from the solvent, and dissolving sulphur so precipitated in a mineral oil at a temperature somewhat below the melting point 0 sulphur.
4. The herein described method of making a stable solution of sulphur in a mineral oil which 10 comprises dissolving the sulphur in an oil at temperature slightly above the melting point of sulphur, allowing the solution to cool and precipitate sulphur, and adding sulphur so precipitated to mineral oil at a temperature below the 15
US138007A 1937-04-20 1937-04-20 Method of producing stable solutions of sulphur in mineral and other oils Expired - Lifetime US2159908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US138007A US2159908A (en) 1937-04-20 1937-04-20 Method of producing stable solutions of sulphur in mineral and other oils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US138007A US2159908A (en) 1937-04-20 1937-04-20 Method of producing stable solutions of sulphur in mineral and other oils

Publications (1)

Publication Number Publication Date
US2159908A true US2159908A (en) 1939-05-23

Family

ID=22480021

Family Applications (1)

Application Number Title Priority Date Filing Date
US138007A Expired - Lifetime US2159908A (en) 1937-04-20 1937-04-20 Method of producing stable solutions of sulphur in mineral and other oils

Country Status (1)

Country Link
US (1) US2159908A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432440A (en) * 1947-12-09 Manufacture of lubfilcatins
US2670330A (en) * 1950-09-29 1954-02-23 Gulf Research Development Co Cutting oils
US2829076A (en) * 1955-03-17 1958-04-01 Sun Oil Co Method of preventing staining of aluminum during annealing
US3252908A (en) * 1963-11-07 1966-05-24 Lubrizol Corp Lubricating oil and additive composition

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432440A (en) * 1947-12-09 Manufacture of lubfilcatins
US2670330A (en) * 1950-09-29 1954-02-23 Gulf Research Development Co Cutting oils
US2829076A (en) * 1955-03-17 1958-04-01 Sun Oil Co Method of preventing staining of aluminum during annealing
US3252908A (en) * 1963-11-07 1966-05-24 Lubrizol Corp Lubricating oil and additive composition

Similar Documents

Publication Publication Date Title
US2159908A (en) Method of producing stable solutions of sulphur in mineral and other oils
US2283602A (en) Grease and lubricant
DE1090804B (en) lubricant
US2313611A (en) Process of sulphurization
US2108644A (en) Grease
US2250545A (en) Lubricating composition
US2167439A (en) Sulphur cutting o
US2444720A (en) Manufacture of lithium base greases
US2392891A (en) Stable sulphurized oils and the method of preparing same
US2043961A (en) Lubricants
US2031986A (en) Improved lubricants and process for manufacturing the same
US2204538A (en) Sulphurized oil
US2450403A (en) Process of making sulfurized jojoba oil
US2179063A (en) Methods of making sulphurized sperm oils and the like
US2218132A (en) Sulphur containing lubricant
US2198562A (en) Method of making sulphurized
US1806933A (en) Of san francisco
US2410578A (en) Mineral oil composition
US1472239A (en) Coating composition for metals and method of making same
US2790770A (en) Grease composition
US2420274A (en) Heavy-duty motor oil composition
US2193771A (en) Lubricating oil composition
US2549525A (en) Manufacture of extreme pressure additives for lubricating oils
US2303853A (en) Cutting oil
US2115354A (en) Blended oils